#ifndef KEYCACHES_INCLUDED
#define KEYCACHES_INCLUDED

/* Copyright (c) 2002, 2012, Oracle and/or its affiliates. All rights reserved.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; version 2 of the License.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software Foundation,
   51 Franklin Street, Suite 500, Boston, MA 02110-1335 USA */

#include "sql_list.h"
#include <keycache.h>

extern "C"
{
    typedef int (*process_key_cache_t) (const char *, KEY_CACHE *);
}

/**
  ilink (intrusive list element) with a name
*/
class NAMED_ILINK : public ilink<NAMED_ILINK>
{
public:
    const char *name;
    uint name_length;
    uchar *data;

    NAMED_ILINK(I_List<NAMED_ILINK> *links, const char *name_arg,
                uint name_length_arg, uchar *data_arg)
        : name_length(name_length_arg), data(data_arg)
    {
        name = my_strndup(name_arg, name_length, MYF(MY_WME));
        links->push_back(this);
    }

    bool cmp(const char *name_cmp, uint length)
    {
        return length == name_length && !memcmp(name, name_cmp, length);
    }

    ~NAMED_ILINK()
    {
        my_free((void *) name);
    }
};

class NAMED_ILIST: public I_List<NAMED_ILINK>
{
public:
    void delete_elements(void (*free_element)(const char *, uchar *));
};

extern LEX_STRING default_key_cache_base;
extern KEY_CACHE zero_key_cache;
extern NAMED_ILIST key_caches;

KEY_CACHE *create_key_cache(const char *name, uint length);
KEY_CACHE *get_key_cache(LEX_STRING *cache_name);
KEY_CACHE *get_or_create_key_cache(const char *name, uint length);
void free_key_cache(const char *name, KEY_CACHE *key_cache);
bool process_key_caches(process_key_cache_t func);

#endif /* KEYCACHES_INCLUDED */
